Flora of North America species comparison

(20–)30–100 cm, 2.5–8 mm wide basally, 0.7–1.6 mm wide distally.

to 80 cm × 3.5 mm, scabrous abaxially.

sheaths usually loose, proximally green-and-white-striped, not white spotted, with conspicuous transverse veins on back, fronts hyaline, sometimes transversely rugose and red dotted, thin, white or hyaline and fragile at mouth;

ligules 2–7 mm, shorter to longer than wide;

widest leaf blades (3–)4–8 mm wide.

sheaths all with blades, fronts rugose, red-brown spotted, veinless, apex hyaline, colorless, fragile, convex, entire;

ligules rounded, 7 mm, free limb to 0.5 mm;

blades not epistomic, to 75 cm × 8 mm.

with 5–15 spikes, 1–5 cm × 8–15 mm, occasionally compound, then somewhat larger;

proximal bracts to 3 cm;

spikes with 5–15 ascending to spreading perigynia;

proximal internodes shorter than to 1.5 times as long as proximal spikes.

densely spicate, cylindric, elongate, with 8–12 branches, 3–7 × 2 cm;

proximal internode to 15 mm.

pale green to pale brown, veinless or 3–7(–12)-veined abaxially, rarely veined adaxially, 3.5–5.5 × 2–3 mm, body somewhat spongy, base thickened, margins serrulate distally;

beak 0.6–1.6 mm, apical teeth 0.3–1 mm.

green with green veins, 3–5-veined abaxially, veinless adaxially, to 4.5 × 2 mm, base spongy on both sides, not distended proximally, rounded;

stipe to 0.3 mm;

beak to 1.8 mm, serrulate.

circular to elliptic- circular, 1.8–2.1 × 1.6–2 mm.

ovate, 2.2 × 1.4 mm;

stalk to 0.2 mm;

persistent style base cylindric.

scales hyaline or brown with green, 1–3-veined center, ovate, 2.6–4.4 × 1.3–2.4 mm, body shorter to slightly longer than perigynium, apex acuminate to short-awned.

1.5–3 mm.

hyaline.